The “add interval” tool doesn’t seem to want to add a perfect unison, no matter if I check “prevent duplicated unisons” or not. Of course I can add any interval and then bring the note down, but I’d prefer not to!
You’re right that it seems to disallow this, even when ‘Prevent unnecessary unisons’ is switched off. I’ll ask Michael (the developer who worked on this feature) about this and come back to you when I get a chance.
Are any news or new developments regarding the “add interval” => unison issue?
No, this remains on our backlog as something to address in future.